debian/patches: Use hwdb to store device autosuspend rules and drop debian specifics

Upstream will use an hwdb to store the device autosuspend (that will be
included in systemd also, so libfprint packagin may stop shipping it at
later point), so use it earlier.

Drop the debian specific rules to set the devices part of the `plugdev`
group as such devices should not be ever readable by an user, but the
access should be managed through a libfprint-based service (frpintd at
the date).

debian/patches/build-Ensure-we-process-the-data-dir.patch

@@ -0,0 +1,21 @@
+From: =?utf-8?b?Ik1hcmNvIFRyZXZpc2FuIChUcmV2acOxbyki?= <mail@3v1n0.net>
+Date: Thu, 21 Jan 2021 00:57:43 +0100
+Subject: build: Ensure we process the data dir
+
+Origin: https://gitlab.freedesktop.org/libfprint/libfprint/-/commit/018641ad
+---
+ meson.build | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/meson.build b/meson.build
+index 415f27e..9494ebb 100644
+--- a/meson.build
++++ b/meson.build
+@@ -237,6 +237,7 @@ if get_option('gtk-examples')
+     subdir('demo')
+ endif
+ 
++subdir('data')
+ subdir('tests')
+ 
+ pkgconfig = import('pkgconfig')